gistfile1.rb

# Bad:
1.upto(10) do |i|
  puts "X" * i
end

# Good:
((nil.object_id - 3)..(2**3 + 2)).map do |i|
  lambda { "X" * i }
end.collect {|i| i.send(:call)}.tap do |a|
  puts a.class.instance_method(:join).send(:bind, a).call("\n")
end